Plants 70–80 cm. Stem solitary, glabrous. Basal leaf blade ovate-oblong, 8–10 × 6–8 cm, 3-pinnatisect, both surfaces glabrous; ultimate segments linear, 4–20 × ca. 1 mm, entire, apex spinose-apiculate; petiole sheath narrow. Cauline leaves reduced upwards, less divided, upper leaves 3-lobed or reduced to sheath, linear. Synflorescence subcorymbosely branched; umbels 5–7 cm across; bracts numerous, lanceolate, 8–12 × 1–1.2 mm, apex caudate; rays 20–25, 2–3 cm, rigid, inner faces strigose; bracteoles 7–9, linear-lanceolate, slightly shorter than or equaling flowers; umbellules ca. 20-flowered. Calyx teeth inconspicuous or obsolete. Petals white or purplish-tinged, obovate-orbicular. Styles short. Fruit oblong-ellipsoid, 3–4 × 2–2.5 mm, smooth; dorsal ribs filiform, slightly prominent, lateral ribs broadly winged; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Jul–Sep.
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